| 摘要 |
PROBLEM TO BE SOLVED: To detect vertical movement, rotation, oil film thickness of a ring, rolling element pass of a rolling bearing, etc., without causing disconnection of a lead wire and a large amount of man-power, and damaging original movement of the ring, and realize the reduction of a measurement preparatory term and cost and improvement of reliability. SOLUTION: A displacement gauge, measuring the amount of displacement of an object to be measured, which is composed of ferromagnetic material is equipped with a Hall element 22 arranged facing the object and a magnet 23 arranged on the rear of the Hall element 22.
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